Merge tag 'drm-misc-next-2023-06-01' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v6.5:

UAPI Changes:

Cross-subsystem Changes:

 * fbdev:
   * Add Kconfig options and initializer macros for file I/O, convert
     DRM fbdev emulation

Core Changes:

 * Unify handling of struct file_operations.show_fdinfo

 * Use .probe in all i2c code (interface cleanup)

 * TTM:
   * Remove unused code

Driver Changes:

 * amdgpu:
   * Use shared show_fdinfo code
   * Fix building without procfs

 * bridge:
   * display-conenctor: Add support for external power supply
   * samsung-dsim: Fix enabling; Support variable clocking
   * tc358767: Fixes
   * ti-sn65dsi83: Fix enabling

 * msm:
   * Use shared show_fdinfo code

 * msxfb:
   * Add support for i.MX93 LCDIF

 * panel:
   * Add support for Ampire AM-800480L1TMQW-T00H plus DT bindings
   * panel-edp: Convert .remove to return void

 * stm:
   * dsi: Use devm_ helper
   * ltdc: Fix potential invalid pointer deref

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230601112246.GA10882@linux-uq9g

1 files changed, 32 insertions, 29 deletions

diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c
index 56ae511367b1..f7f436cf96e0 100644
--- a/drivers/gpu/drm/bridge/display-connector.c
+++ b/drivers/gpu/drm/bridge/display-connector.c
@@ -24,7 +24,7 @@ struct display_connector {
 	struct gpio_desc	*hpd_gpio;
 	int			hpd_irq;
 
-	struct regulator	*dp_pwr;
+	struct regulator	*supply;
 	struct gpio_desc	*ddc_en;
 };
 
@@ -191,6 +191,18 @@ static irqreturn_t display_connector_hpd_irq(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
+static int display_connector_get_supply(struct platform_device *pdev,
+					struct display_connector *conn,
+					const char *name)
+{
+	conn->supply = devm_regulator_get_optional(&pdev->dev, name);
+
+	if (conn->supply == ERR_PTR(-ENODEV))
+		conn->supply = NULL;
+
+	return PTR_ERR_OR_ZERO(conn->supply);
+}
+
 static int display_connector_probe(struct platform_device *pdev)
 {
 	struct display_connector *conn;
@@ -316,36 +328,15 @@ static int display_connector_probe(struct platform_device *pdev)
 	if (type == DRM_MODE_CONNECTOR_DisplayPort) {
 		int ret;
 
-		conn->dp_pwr = devm_regulator_get_optional(&pdev->dev, "dp-pwr");
-
-		if (IS_ERR(conn->dp_pwr)) {
-			ret = PTR_ERR(conn->dp_pwr);
-
-			switch (ret) {
-			case -ENODEV:
-				conn->dp_pwr = NULL;
-				break;
-
-			case -EPROBE_DEFER:
-				return -EPROBE_DEFER;
-
-			default:
-				dev_err(&pdev->dev, "failed to get DP PWR regulator: %d\n", ret);
-				return ret;
-			}
-		}
-
-		if (conn->dp_pwr) {
-			ret = regulator_enable(conn->dp_pwr);
-			if (ret) {
-				dev_err(&pdev->dev, "failed to enable DP PWR regulator: %d\n", ret);
-				return ret;
-			}
-		}
+		ret = display_connector_get_supply(pdev, conn, "dp-pwr");
+		if (ret < 0)
+			return dev_err_probe(&pdev->dev, ret, "failed to get DP PWR regulator\n");
 	}
 
 	/* enable DDC */
 	if (type == DRM_MODE_CONNECTOR_HDMIA) {
+		int ret;
+
 		conn->ddc_en = devm_gpiod_get_optional(&pdev->dev, "ddc-en",
 						       GPIOD_OUT_HIGH);
 
@@ -353,6 +344,18 @@ static int display_connector_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev, "Couldn't get ddc-en gpio\n");
 			return PTR_ERR(conn->ddc_en);
 		}
+
+		ret = display_connector_get_supply(pdev, conn, "hdmi-pwr");
+		if (ret < 0)
+			return dev_err_probe(&pdev->dev, ret, "failed to get HDMI +5V Power regulator\n");
+	}
+
+	if (conn->supply) {
+		ret = regulator_enable(conn->supply);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to enable PWR regulator: %d\n", ret);
+			return ret;
+		}
 	}
 
 	conn->bridge.funcs = &display_connector_bridge_funcs;
@@ -386,8 +389,8 @@ static void display_connector_remove(struct platform_device *pdev)
 	if (conn->ddc_en)
 		gpiod_set_value(conn->ddc_en, 0);
 
-	if (conn->dp_pwr)
-		regulator_disable(conn->dp_pwr);
+	if (conn->supply)
+		regulator_disable(conn->supply);
 
 	drm_bridge_remove(&conn->bridge);